Add intellj project files to .gitignore
Merge pull request #19 from CloudBees-community/gitignore-for-intellij

Add intellj project files to .gitignore
Introduce a 'production' profile to use a JNDI datasource instead of the datasource instantiated by the .war application.

1. Remove the `spring.profiles.active` web context-param to allow overriding of the application's profile by a system property -> `web.xml`
2. Associate the JDBC repositories implementation with the `default` profile in addition to the existing association with the `jdbc` profile -> `business-config.xml`
3. allow to override values of `data-access.properties` with system properties -> `business-config.xml` and `datasource-config.xml`
4. introduce a `production` profile to use the JNDI datasource instead of the embedded datasource -> `datasource-config.xml`
CloudBees Clickstart
CloudBees customisation: don't create a `petclinic` database, use the default database.